/* Copyright 2023 Dual Tachyon
 * https://github.com/DualTachyon
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 */

#include <string.h>

#include "app/dtmf.h"
#ifdef ENABLE_FMRADIO
#include "app/fm.h"
#endif
#ifdef ENABLE_PMR_MODE
#include "app/pmr.h"
#endif
#include "driver/bk1080.h"
#include "driver/bk4819.h"
#include "driver/eeprom.h"
#include "misc.h"
#include "settings.h"
#include "ui/menu.h"

static const uint32_t gDefaultFrequencyTable[] =
  {
    14500000,    //
    14550000,    //
    43300000,    //
    43320000,    //
    43350000     //
  };

EEPROM_Config_t gEeprom = { 0 };

#ifdef ENABLE_PMR_MODE
void SETTINGS_SavePMR() {
  uint8_t Data[8] = {0};
  EEPROM_ReadBuffer(0x0E70, Data, 8);
  Data[3] = 0xFF;
  if (!gPMR_Mode_Active) Data[3] &= ~(1u << 7);
  EEPROM_WriteBuffer(0x0E70, Data);
}
#endif

void SETTINGS_InitEEPROM(void)
{
  uint8_t Data[16] = {0};
  // 0E70..0E77
  EEPROM_ReadBuffer(0x0E70, Data, 8);
  gEeprom.CHAN_1_CALL          = IS_MR_CHANNEL(Data[0]) ? Data[0] : MR_CHANNEL_FIRST;
  gEeprom.SQUELCH_LEVEL        = (Data[1] < 10) ? Data[1] : 1;
  gEeprom.TX_TIMEOUT_TIMER     = (Data[2] < 11) ? Data[2] : 1;
#ifdef ENABLE_NOAA
  //gEeprom.NOAA_AUTO_SCAN   = (Data[3] <  2) ? Data[3] : false;
  gEeprom.NOAA_AUTO_SCAN  = !!(Data[3] & (1u << 1));
#endif

#ifdef ENABLE_PMR_MODE
  gPMR_Mode_Active        = !!(Data[3] & (1u << 7));
#endif

  gEeprom.KEY_LOCK             = (Data[4] <  2) ? Data[4] : false;
#ifdef ENABLE_VOX
  gEeprom.VOX_SWITCH       = (Data[5] <  2) ? Data[5] : false;
  gEeprom.VOX_LEVEL        = (Data[6] < 10) ? Data[6] : 1;
#endif
  gEeprom.MIC_SENSITIVITY      = (Data[7] <  5) ? Data[7] : 4;

  // 0E78..0E7F
  EEPROM_ReadBuffer(0x0E78, Data, 8);
  gEeprom.BACKLIGHT_MAX 		  = (Data[0] & 0xF) <= 10 ? (Data[0] & 0xF) : 10;
  gEeprom.BACKLIGHT_MIN 		  = (Data[0] >> 4) < gEeprom.BACKLIGHT_MAX ? (Data[0] >> 4) : 0;
#ifdef ENABLE_BLMIN_TMP_OFF
  gEeprom.BACKLIGHT_MIN_STAT	  = BLMIN_STAT_ON;
#endif
  gEeprom.CHANNEL_DISPLAY_MODE  = (Data[1] < 4) ? Data[1] : MDF_FREQUENCY;    // 4 instead of 3 - extra display mode
  gEeprom.CROSS_BAND_RX_TX      = (Data[2] < 3) ? Data[2] : CROSS_BAND_OFF;
  gEeprom.BATTERY_SAVE          = (Data[3] < 5) ? Data[3] : 4;
  gEeprom.DUAL_WATCH            = (Data[4] < 3) ? Data[4] : DUAL_WATCH_CHAN_A;
  gEeprom.BACKLIGHT_TIME        = (Data[5] < ARRAY_SIZE(gSubMenu_BACKLIGHT)) ? Data[5] : 3;

  //gEeprom.TAIL_TONE_ELIMINATION = (Data[6] < 2) ? Data[6] : false;
  gEeprom.VFO_OPEN              = (Data[7] < 2) ? Data[7] : true;

  gEeprom.TAIL_TONE_ELIMINATION = (Data[6] >> 7) & 1;

#ifdef ENABLE_CONTRAST
  gEeprom.LCD_CONTRAST		  = Data[6] & 0x7F;
#endif

  // 0E80..0E87
  EEPROM_ReadBuffer(0x0E80, Data, 8);
  gEeprom.ScreenChannel[0]   = IS_VALID_CHANNEL(Data[0]) ? Data[0] : (FREQ_CHANNEL_FIRST + BAND6_400MHz);
  gEeprom.ScreenChannel[1]   = IS_VALID_CHANNEL(Data[3]) ? Data[3] : (FREQ_CHANNEL_FIRST + BAND6_400MHz);
  gEeprom.MrChannel[0]       = IS_MR_CHANNEL(Data[1])    ? Data[1] : MR_CHANNEL_FIRST;
  gEeprom.MrChannel[1]       = IS_MR_CHANNEL(Data[4])    ? Data[4] : MR_CHANNEL_FIRST;
  gEeprom.FreqChannel[0]     = IS_FREQ_CHANNEL(Data[2])  ? Data[2] : (FREQ_CHANNEL_FIRST + BAND6_400MHz);
  gEeprom.FreqChannel[1]     = IS_FREQ_CHANNEL(Data[5])  ? Data[5] : (FREQ_CHANNEL_FIRST + BAND6_400MHz);
#ifdef ENABLE_NOAA
  gEeprom.NoaaChannel[0] = IS_NOAA_CHANNEL(Data[6])  ? Data[6] : NOAA_CHANNEL_FIRST;
  gEeprom.NoaaChannel[1] = IS_NOAA_CHANNEL(Data[7])  ? Data[7] : NOAA_CHANNEL_FIRST;
#endif

#ifdef ENABLE_FMRADIO
  {	// 0E88..0E8F
    struct
    {
      uint16_t selFreq;
      uint8_t  selChn;
      uint8_t  isMrMode:1;
      uint8_t  band:2;
      uint8_t  space:2;
      uint8_t  preemp:1;
    } __attribute__((packed)) fmCfg;
    EEPROM_ReadBuffer(0x0E88, &fmCfg, sizeof(fmCfg));

    gEeprom.FM_Band = fmCfg.band;
    gEeprom.FM_Space = fmCfg.space;
    gEeprom.FM_Preemp = fmCfg.preemp;
    gEeprom.FM_SelectedFrequency =
      (fmCfg.selFreq >= BK1080_GetFreqLoLimit(gEeprom.FM_Band) && fmCfg.selFreq <= BK1080_GetFreqHiLimit(gEeprom.FM_Band)) ?
      fmCfg.selFreq : BK1080_GetFreqLoLimit(gEeprom.FM_Band);

    gEeprom.FM_SelectedChannel = fmCfg.selChn;
    gEeprom.FM_IsMrMode        = fmCfg.isMrMode;
  }

  // 0E40..0E67
  EEPROM_ReadBuffer(0x0E40, gFM_Channels, sizeof(gFM_Channels));
  FM_ConfigureChannelState();
#endif

  // 0E90..0E97
  EEPROM_ReadBuffer(0x0E90, Data, 8);
  gEeprom.BEEP_CONTROL                 = Data[0] & 1;
  gEeprom.KEY_M_LONG_PRESS_ACTION      = ((Data[0] >> 1) < ACTION_OPT_LEN) ? (Data[0] >> 1) : ACTION_OPT_NONE;
  gEeprom.KEY_1_SHORT_PRESS_ACTION     = (Data[1] < ACTION_OPT_LEN) ? Data[1] : ACTION_OPT_MONITOR;
  gEeprom.KEY_1_LONG_PRESS_ACTION      = (Data[2] < ACTION_OPT_LEN) ? Data[2] : ACTION_OPT_SCAN;
  gEeprom.KEY_2_SHORT_PRESS_ACTION     = (Data[3] < ACTION_OPT_LEN) ? Data[3] : ACTION_OPT_A_B;
  gEeprom.KEY_2_LONG_PRESS_ACTION      = (Data[4] < ACTION_OPT_LEN) ? Data[4] : ACTION_OPT_FM;
  gEeprom.SCAN_RESUME_MODE             = (Data[5] < 3)              ? Data[5] : SCAN_RESUME_CO;
  gEeprom.AUTO_KEYPAD_LOCK             = (Data[6] < 2)              ? Data[6] : false;
  gEeprom.POWER_ON_DISPLAY_MODE        = (Data[7] < 4)              ? Data[7] : POWER_ON_DISPLAY_MODE_FULL_SCREEN;

  // 0E98..0E9F
  EEPROM_ReadBuffer(0x0E98, Data, 8);
  memcpy(&gEeprom.POWER_ON_PASSWORD, Data, 4);

  // 0EA0..0EA7
  EEPROM_ReadBuffer(0x0EA0, Data, 8);
#ifdef ENABLE_VOICE
  gEeprom.VOICE_PROMPT = (Data[0] < 3) ? Data[0] : VOICE_PROMPT_ENGLISH;
#endif
#ifdef ENABLE_RSSI_BAR
  if((Data[1] < 200 && Data[1] > 90) && (Data[2] < Data[1]-9 && Data[1] < 160  && Data[2] > 50)) {
    gEeprom.S0_LEVEL = Data[1];
    gEeprom.S9_LEVEL = Data[2];
  }
  else {
    gEeprom.S0_LEVEL = 130;
    gEeprom.S9_LEVEL = 76;
  }
#endif

  // 0EA8..0EAF
  EEPROM_ReadBuffer(0x0EA8, Data, 8);
#ifdef ENABLE_ALARM
  gEeprom.ALARM_MODE                 = (Data[0] <  2) ? Data[0] : true;
#endif
  gEeprom.ROGER                          = (Data[1] <  3) ? Data[1] : ROGER_MODE_OFF;
  gEeprom.REPEATER_TAIL_TONE_ELIMINATION = (Data[2] < 11) ? Data[2] : 0;
  gEeprom.TX_VFO                         = (Data[3] <  2) ? Data[3] : 0;
  gEeprom.BATTERY_TYPE                   = (Data[4] < BATTERY_TYPE_UNKNOWN) ? Data[4] : BATTERY_TYPE_1600_MAH;

  // 0ED0..0ED7
  EEPROM_ReadBuffer(0x0ED0, Data, 8);
  gEeprom.DTMF_SIDE_TONE               = (Data[0] <   2) ? Data[0] : true;

#ifdef ENABLE_DTMF_CALLING
  gEeprom.DTMF_SEPARATE_CODE           = DTMF_ValidateCodes((char *)(Data + 1), 1) ? Data[1] : '*';
  gEeprom.DTMF_GROUP_CALL_CODE         = DTMF_ValidateCodes((char *)(Data + 2), 1) ? Data[2] : '#';
  gEeprom.DTMF_DECODE_RESPONSE         = (Data[3] < 4) ? Data[3] : 0;
  gEeprom.DTMF_auto_reset_time         = (Data[4] < 61 && Data[4] >= 5) ? Data[4] : 10;
#endif
  gEeprom.DTMF_PRELOAD_TIME            = (Data[5] < 101) ? Data[5] * 10 : 300;
  gEeprom.DTMF_FIRST_CODE_PERSIST_TIME = (Data[6] < 101) ? Data[6] * 10 : 100;
  gEeprom.DTMF_HASH_CODE_PERSIST_TIME  = (Data[7] < 101) ? Data[7] * 10 : 100;

  // 0ED8..0EDF
  EEPROM_ReadBuffer(0x0ED8, Data, 8);
  gEeprom.DTMF_CODE_PERSIST_TIME  = (Data[0] < 101) ? Data[0] * 10 : 100;
  gEeprom.DTMF_CODE_INTERVAL_TIME = (Data[1] < 101) ? Data[1] * 10 : 100;
#ifdef ENABLE_DTMF_CALLING
  gEeprom.PERMIT_REMOTE_KILL      = (Data[2] <   2) ? Data[2] : true;

  // 0EE0..0EE7

  EEPROM_ReadBuffer(0x0EE0, Data, sizeof(gEeprom.ANI_DTMF_ID));
  if (DTMF_ValidateCodes((char *)Data, sizeof(gEeprom.ANI_DTMF_ID))) {
    memcpy(gEeprom.ANI_DTMF_ID, Data, sizeof(gEeprom.ANI_DTMF_ID));
  } else {
    strcpy(gEeprom.ANI_DTMF_ID, "123");
  }


  // 0EE8..0EEF
  EEPROM_ReadBuffer(0x0EE8, Data, sizeof(gEeprom.KILL_CODE));
  if (DTMF_ValidateCodes((char *)Data, sizeof(gEeprom.KILL_CODE))) {
    memcpy(gEeprom.KILL_CODE, Data, sizeof(gEeprom.KILL_CODE));
  } else {
    strcpy(gEeprom.KILL_CODE, "DEADB");
  }

  // 0EF0..0EF7
  EEPROM_ReadBuffer(0x0EF0, Data, sizeof(gEeprom.REVIVE_CODE));
  if (DTMF_ValidateCodes((char *)Data, sizeof(gEeprom.REVIVE_CODE))) {
    memcpy(gEeprom.REVIVE_CODE, Data, sizeof(gEeprom.REVIVE_CODE));
  } else {
    strcpy(gEeprom.REVIVE_CODE, "9DCBA");
  }
#endif

  // 0EF8..0F07
  EEPROM_ReadBuffer(0x0EF8, Data, sizeof(gEeprom.DTMF_UP_CODE));
  if (DTMF_ValidateCodes((char *)Data, sizeof(gEeprom.DTMF_UP_CODE))) {
    memcpy(gEeprom.DTMF_UP_CODE, Data, sizeof(gEeprom.DTMF_UP_CODE));
  } else {
    strcpy(gEeprom.DTMF_UP_CODE, "12345");
  }

  // 0F08..0F17
  EEPROM_ReadBuffer(0x0F08, Data, sizeof(gEeprom.DTMF_DOWN_CODE));
  if (DTMF_ValidateCodes((char *)Data, sizeof(gEeprom.DTMF_DOWN_CODE))) {
    memcpy(gEeprom.DTMF_DOWN_CODE, Data, sizeof(gEeprom.DTMF_DOWN_CODE));
  } else {
    strcpy(gEeprom.DTMF_DOWN_CODE, "54321");
  }

  // 0F18..0F1F
  EEPROM_ReadBuffer(0x0F18, Data, 8);
  gEeprom.SCAN_LIST_DEFAULT = (Data[0] < 3) ? Data[0] : 0;  // we now have 'all' channel scan option
  for (unsigned int i = 0; i < 2; i++)
    {
      const unsigned int j = 1 + (i * 3);
      gEeprom.SCAN_LIST_ENABLED[i]     = (Data[j + 0] < 2) ? Data[j] : false;
      gEeprom.SCANLIST_PRIORITY_CH1[i] =  Data[j + 1];
      gEeprom.SCANLIST_PRIORITY_CH2[i] =  Data[j + 2];
    }

  // 0F40..0F47
  EEPROM_ReadBuffer(0x0F40, Data, 8);
  gSetting_F_LOCK            = (Data[0] < F_LOCK_LEN) ? Data[0] : F_LOCK_DEF;
  gSetting_350TX             = (Data[1] < 2) ? Data[1] : false;  // was true
#ifdef ENABLE_DTMF_CALLING
  gSetting_KILLED            = (Data[2] < 2) ? Data[2] : false;
#endif
  gSetting_200TX             = (Data[3] < 2) ? Data[3] : false;
  gSetting_500TX             = (Data[4] < 2) ? Data[4] : false;
  gSetting_350EN             = (Data[5] < 2) ? Data[5] : true;

  gSetting_ScrambleEnable    = (Data[6] < 2) ? Data[6] : true;

  //gSetting_TX_EN             = (Data[7] & (1u << 0)) ? true : false;
  gSetting_live_DTMF_decoder = !!(Data[7] & (1u << 1));
  gSetting_battery_text      = (((Data[7] >> 2) & 3u) <= 2) ? (Data[7] >> 2) & 3 : 2;
#ifdef ENABLE_AUDIO_BAR
  gSetting_mic_bar       = !!(Data[7] & (1u << 4));
#endif

  //gSetting_AM_fix        = !!(Data[7] & (1u << 5));

  gSetting_backlight_on_tx_rx = (Data[7] >> 6) & 3u;

  if (!gEeprom.VFO_OPEN)
    {
      gEeprom.ScreenChannel[0] = gEeprom.MrChannel[0];
      gEeprom.ScreenChannel[1] = gEeprom.MrChannel[1];
    }

  // 0D60..0E27
  EEPROM_ReadBuffer(0x0D60, gMR_ChannelAttributes, sizeof(gMR_ChannelAttributes));
  for(uint16_t i = 0; i < sizeof(gMR_ChannelAttributes); i++) {
    ChannelAttributes_t *att = &gMR_ChannelAttributes[i];
    if(att->__val == 0xff){
      att->__val = 0;
      att->band = 0xf;
    }
  }

  // 0F30..0F3F
  /*EEPROM_ReadBuffer(0x0F30, gCustomAesKey, sizeof(gCustomAesKey));
    bHasCustomAesKey = false;
    for (unsigned int i = 0; i < ARRAY_SIZE(gCustomAesKey); i++)
    {
    if (gCustomAesKey[i] != 0xFFFFFFFFu)
    {
    bHasCustomAesKey = true;
    return;
    }
    }*/
}

void SETTINGS_LoadCalibration(void)
{
  //	uint8_t Mic;

  EEPROM_ReadBuffer(0x1EC0, gEEPROM_RSSI_CALIB[3], 8);
  memcpy(gEEPROM_RSSI_CALIB[4], gEEPROM_RSSI_CALIB[3], 8);
  memcpy(gEEPROM_RSSI_CALIB[5], gEEPROM_RSSI_CALIB[3], 8);
  memcpy(gEEPROM_RSSI_CALIB[6], gEEPROM_RSSI_CALIB[3], 8);

  EEPROM_ReadBuffer(0x1EC8, gEEPROM_RSSI_CALIB[0], 8);
  memcpy(gEEPROM_RSSI_CALIB[1], gEEPROM_RSSI_CALIB[0], 8);
  memcpy(gEEPROM_RSSI_CALIB[2], gEEPROM_RSSI_CALIB[0], 8);

  EEPROM_ReadBuffer(0x1F40, gBatteryCalibration, 12);
  if (gBatteryCalibration[0] >= 5000)
    {
      gBatteryCalibration[0] = 1900;
      gBatteryCalibration[1] = 2000;
    }
  gBatteryCalibration[5] = 2300;

#ifdef ENABLE_VOX
  EEPROM_ReadBuffer(0x1F50 + (gEeprom.VOX_LEVEL * 2), &gEeprom.VOX1_THRESHOLD, 2);
  EEPROM_ReadBuffer(0x1F68 + (gEeprom.VOX_LEVEL * 2), &gEeprom.VOX0_THRESHOLD, 2);
#endif

  //EEPROM_ReadBuffer(0x1F80 + gEeprom.MIC_SENSITIVITY, &Mic, 1);
  //gEeprom.MIC_SENSITIVITY_TUNING = (Mic < 32) ? Mic : 15;
  gEeprom.MIC_SENSITIVITY_TUNING = gMicGain_dB2[gEeprom.MIC_SENSITIVITY];

  {
    struct
    {
      int16_t  BK4819_XtalFreqLow;
      uint16_t EEPROM_1F8A;
      uint16_t EEPROM_1F8C;
      uint8_t  VOLUME_GAIN;
      uint8_t  DAC_GAIN;
    } __attribute__((packed)) Misc;

    // radio 1 .. 04 00 46 00 50 00 2C 0E
    // radio 2 .. 05 00 46 00 50 00 2C 0E
    EEPROM_ReadBuffer(0x1F88, &Misc, 8);

    gEeprom.BK4819_XTAL_FREQ_LOW = (Misc.BK4819_XtalFreqLow >= -1000 && Misc.BK4819_XtalFreqLow <= 1000) ? Misc.BK4819_XtalFreqLow : 0;
    gEEPROM_1F8A                 = Misc.EEPROM_1F8A & 0x01FF;
    gEEPROM_1F8C                 = Misc.EEPROM_1F8C & 0x01FF;
    gEeprom.VOLUME_GAIN          = (Misc.VOLUME_GAIN < 64) ? Misc.VOLUME_GAIN : 58;
    gEeprom.DAC_GAIN             = (Misc.DAC_GAIN    < 16) ? Misc.DAC_GAIN    : 8;

    BK4819_WriteRegister(BK4819_REG_3B, 22656 + gEeprom.BK4819_XTAL_FREQ_LOW);
    //		BK4819_WriteRegister(BK4819_REG_3C, gEeprom.BK4819_XTAL_FREQ_HIGH);
  }
}

uint32_t SETTINGS_FetchChannelFrequency(const int channel)
{
  struct
  {
    uint32_t frequency;
    uint32_t offset;
  } __attribute__((packed)) info;

  EEPROM_ReadBuffer(channel * 16, &info, sizeof(info));

  return info.frequency;
}

void SETTINGS_FetchChannelName(char *s, const int channel)
{
  if (s == NULL)
    return;

  s[0] = 0;

  if (channel < 0)
    return;

  if (!RADIO_CheckValidChannel(channel, false, 0))
    return;

  EEPROM_ReadBuffer(0x0F50 + (channel * 16), s, 10);

  int i;
  for (i = 0; i < 10; i++)
    if (s[i] < 32 || s[i] > 127)
      break;                // invalid char

  s[i--] = 0;                   // null term

  while (i >= 0 && s[i] == 32)  // trim trailing spaces
    s[i--] = 0;               // null term
}

void SETTINGS_FactoryReset(bool bIsAll)
{
  uint16_t i;
  uint8_t  Template[8];

  memset(Template, 0xFF, sizeof(Template));

  for (i = 0x0C80; i < 0x1E00; i += 8)
    {
      if (
	  !(i >= 0x0EE0 && i < 0x0F18) &&         // ANI ID + DTMF codes
	  !(i >= 0x0F30 && i < 0x0F50) &&         // AES KEY + F LOCK + Scramble Enable
	  !(i >= 0x1C00 && i < 0x1E00) &&         // DTMF contacts
	  !(i >= 0x0EB0 && i < 0x0ED0) &&         // Welcome strings
	  !(i >= 0x0EA0 && i < 0x0EA8) &&         // Voice Prompt
	  (bIsAll ||
	   (
	    !(i >= 0x0D60 && i < 0x0E28) &&     // MR Channel Attributes
	    !(i >= 0x0F18 && i < 0x0F30) &&     // Scan List
	    !(i >= 0x0F50 && i < 0x1C00) &&     // MR Channel Names
	    !(i >= 0x0E40 && i < 0x0E70) &&     // FM Channels
	    !(i >= 0x0E88 && i < 0x0E90)        // FM settings
	    ))
	  )
	{
	  EEPROM_WriteBuffer(i, Template);
	}
    }

  if (bIsAll)
    {
      RADIO_InitInfo(gRxVfo, FREQ_CHANNEL_FIRST + BAND6_400MHz, 43350000);

      // set the first few memory channels
      for (i = 0; i < ARRAY_SIZE(gDefaultFrequencyTable); i++)
	{
	  const uint32_t Frequency   = gDefaultFrequencyTable[i];
	  gRxVfo->freq_config_RX.Frequency = Frequency;
	  gRxVfo->freq_config_TX.Frequency = Frequency;
	  gRxVfo->Band               = FREQUENCY_GetBand(Frequency);
	  SETTINGS_SaveChannel(MR_CHANNEL_FIRST + i, 0, gRxVfo, 2);
	}
    }
}

#ifdef ENABLE_FMRADIO
void SETTINGS_SaveFM(void)
{
  union {
    struct {
      uint16_t selFreq;
      uint8_t  selChn;
      uint8_t  isMrMode:1;
      uint8_t  band:2;
      uint8_t  space:2;
      uint8_t  preemp:1;
    };
    uint8_t __raw[8];
  } __attribute__((packed)) fmCfg;

  memset(fmCfg.__raw, 0xFF, sizeof(fmCfg.__raw));
  fmCfg.selChn   = gEeprom.FM_SelectedChannel;
  fmCfg.selFreq  = gEeprom.FM_SelectedFrequency;
  fmCfg.isMrMode = gEeprom.FM_IsMrMode;
  fmCfg.band     = gEeprom.FM_Band;
  fmCfg.space    = gEeprom.FM_Space;
  fmCfg.preemp   = gEeprom.FM_Preemp;
  EEPROM_WriteBuffer(0x0E88, fmCfg.__raw);

  for (unsigned i = 0; i < 5; i++)
    EEPROM_WriteBuffer(0x0E40 + (i * 8), &gFM_Channels[i * 4]);
}
#endif

void SETTINGS_SaveVfoIndices(void)
{
  uint8_t State[8];

#ifndef ENABLE_NOAA
  EEPROM_ReadBuffer(0x0E80, State, sizeof(State));
#endif

  State[0] = gEeprom.ScreenChannel[0];
  State[1] = gEeprom.MrChannel[0];
  State[2] = gEeprom.FreqChannel[0];
  State[3] = gEeprom.ScreenChannel[1];
  State[4] = gEeprom.MrChannel[1];
  State[5] = gEeprom.FreqChannel[1];
#ifdef ENABLE_NOAA
  State[6] = gEeprom.NoaaChannel[0];
  State[7] = gEeprom.NoaaChannel[1];
#endif

  EEPROM_WriteBuffer(0x0E80, State);
}

void SETTINGS_SaveSettings(void)
{

#ifdef ENABLE_PMR_MODE
  if ( gPMR_Mode_Active ) {
    return;
  }
#endif

  uint8_t  State[8];
  uint32_t Password[2];

  State[0] = gEeprom.CHAN_1_CALL;
  State[1] = gEeprom.SQUELCH_LEVEL;
  State[2] = gEeprom.TX_TIMEOUT_TIMER;

#ifdef ENABLE_NOAA
  State[3] = gEeprom.NOAA_AUTO_SCAN;
#else
#ifdef ENABLE_PMR_MODE
  State[3] = (gPMR_Mode_Active << 7);
#else
  State[3] = false;
#endif
#endif

  State[4] = gEeprom.KEY_LOCK;
#ifdef ENABLE_VOX
  State[5] = gEeprom.VOX_SWITCH;
  State[6] = gEeprom.VOX_LEVEL;
#else
  State[5] = false;
  State[6] = 0;
#endif
  State[7] = gEeprom.MIC_SENSITIVITY;
  EEPROM_WriteBuffer(0x0E70, State);

  State[0] = (gEeprom.BACKLIGHT_MIN << 4) + gEeprom.BACKLIGHT_MAX;
  State[1] = gEeprom.CHANNEL_DISPLAY_MODE;
  State[2] = gEeprom.CROSS_BAND_RX_TX;
  State[3] = gEeprom.BATTERY_SAVE;
  State[4] = gEeprom.DUAL_WATCH;
  State[5] = gEeprom.BACKLIGHT_TIME;
  //State[6] = gEeprom.TAIL_TONE_ELIMINATION;
  State[7] = gEeprom.VFO_OPEN;

#ifdef ENABLE_CONTRAST
  State[6] = (gEeprom.LCD_CONTRAST & 0x7F) | (gEeprom.TAIL_TONE_ELIMINATION << 7);
#else
  State[6] = (gEeprom.TAIL_TONE_ELIMINATION << 7);
#endif

  EEPROM_WriteBuffer(0x0E78, State);

  State[0] = gEeprom.BEEP_CONTROL;
  State[0] |= gEeprom.KEY_M_LONG_PRESS_ACTION << 1;
  State[1] = gEeprom.KEY_1_SHORT_PRESS_ACTION;
  State[2] = gEeprom.KEY_1_LONG_PRESS_ACTION;
  State[3] = gEeprom.KEY_2_SHORT_PRESS_ACTION;
  State[4] = gEeprom.KEY_2_LONG_PRESS_ACTION;
  State[5] = gEeprom.SCAN_RESUME_MODE;
  State[6] = gEeprom.AUTO_KEYPAD_LOCK;
  State[7] = gEeprom.POWER_ON_DISPLAY_MODE;
  EEPROM_WriteBuffer(0x0E90, State);

  memset(Password, 0xFF, sizeof(Password));
#ifdef ENABLE_PWRON_PASSWORD
  Password[0] = gEeprom.POWER_ON_PASSWORD;
#endif
  EEPROM_WriteBuffer(0x0E98, Password);

  memset(State, 0xFF, sizeof(State));
#ifdef ENABLE_VOICE
  State[0] = gEeprom.VOICE_PROMPT;
#endif
#ifdef ENABLE_RSSI_BAR
  State[1] = gEeprom.S0_LEVEL;
  State[2] = gEeprom.S9_LEVEL;
#endif
  EEPROM_WriteBuffer(0x0EA0, State);


#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
  State[0] = gEeprom.ALARM_MODE;
#else
  State[0] = false;
#endif
  State[1] = gEeprom.ROGER;
  State[2] = gEeprom.REPEATER_TAIL_TONE_ELIMINATION;
  State[3] = gEeprom.TX_VFO;
  State[4] = gEeprom.BATTERY_TYPE;
  EEPROM_WriteBuffer(0x0EA8, State);

  State[0] = gEeprom.DTMF_SIDE_TONE;
#ifdef ENABLE_DTMF_CALLING
  State[1] = gEeprom.DTMF_SEPARATE_CODE;
  State[2] = gEeprom.DTMF_GROUP_CALL_CODE;
  State[3] = gEeprom.DTMF_DECODE_RESPONSE;
  State[4] = gEeprom.DTMF_auto_reset_time;
#endif
  State[5] = gEeprom.DTMF_PRELOAD_TIME / 10U;
  State[6] = gEeprom.DTMF_FIRST_CODE_PERSIST_TIME / 10U;
  State[7] = gEeprom.DTMF_HASH_CODE_PERSIST_TIME / 10U;
  EEPROM_WriteBuffer(0x0ED0, State);

  memset(State, 0xFF, sizeof(State));
  State[0] = gEeprom.DTMF_CODE_PERSIST_TIME / 10U;
  State[1] = gEeprom.DTMF_CODE_INTERVAL_TIME / 10U;
#ifdef ENABLE_DTMF_CALLING
  State[2] = gEeprom.PERMIT_REMOTE_KILL;
#endif
  EEPROM_WriteBuffer(0x0ED8, State);

  State[0] = gEeprom.SCAN_LIST_DEFAULT;
  State[1] = gEeprom.SCAN_LIST_ENABLED[0];
  State[2] = gEeprom.SCANLIST_PRIORITY_CH1[0];
  State[3] = gEeprom.SCANLIST_PRIORITY_CH2[0];
  State[4] = gEeprom.SCAN_LIST_ENABLED[1];
  State[5] = gEeprom.SCANLIST_PRIORITY_CH1[1];
  State[6] = gEeprom.SCANLIST_PRIORITY_CH2[1];
  State[7] = 0xFF;
  EEPROM_WriteBuffer(0x0F18, State);

  memset(State, 0xFF, sizeof(State));
  State[0]  = gSetting_F_LOCK;
  State[1]  = gSetting_350TX;
#ifdef ENABLE_DTMF_CALLING
  State[2]  = gSetting_KILLED;
#endif
  State[3]  = gSetting_200TX;
  State[4]  = gSetting_500TX;
  State[5]  = gSetting_350EN;
  State[6]  = gSetting_ScrambleEnable;
  //if (!gSetting_TX_EN)             State[7] &= ~(1u << 0);
  if (!gSetting_live_DTMF_decoder) State[7] &= ~(1u << 1);
  State[7] = (State[7] & ~(3u << 2)) | ((gSetting_battery_text & 3u) << 2);
#ifdef ENABLE_AUDIO_BAR
  if (!gSetting_mic_bar)           State[7] &= ~(1u << 4);
#endif

  //if (!gSetting_AM_fix)            State[7] &= ~(1u << 5);

  State[7] = (State[7] & ~(3u << 6)) | ((gSetting_backlight_on_tx_rx & 3u) << 6);

  EEPROM_WriteBuffer(0x0F40, State);
}

void SETTINGS_SaveChannel(uint8_t Channel, uint8_t VFO, const VFO_Info_t *pVFO, uint8_t Mode)
{
#ifdef ENABLE_NOAA
  if (IS_NOAA_CHANNEL(Channel))
    return;
#endif

  uint16_t OffsetVFO = Channel * 16;

  if (IS_FREQ_CHANNEL(Channel)) { // it's a VFO, not a channel
    OffsetVFO  = (VFO == 0) ? 0x0C80 : 0x0C90;
    OffsetVFO += (Channel - FREQ_CHANNEL_FIRST) * 32;
  }

  if (Mode >= 2 || IS_FREQ_CHANNEL(Channel)) { // copy VFO to a channel
    union {
      uint8_t _8[8];
      uint32_t _32[2];
    } State;

    State._32[0] = pVFO->freq_config_RX.Frequency;
    State._32[1] = pVFO->TX_OFFSET_FREQUENCY;
    EEPROM_WriteBuffer(OffsetVFO + 0, State._32);

    State._8[0] =  pVFO->freq_config_RX.Code;
    State._8[1] =  pVFO->freq_config_TX.Code;
    State._8[2] = (pVFO->freq_config_TX.CodeType << 4) | pVFO->freq_config_RX.CodeType;
    State._8[3] = (pVFO->Modulation << 4) | pVFO->TX_OFFSET_FREQUENCY_DIRECTION;
    State._8[4] = 0
      | (pVFO->BUSY_CHANNEL_LOCK << 4)
      | (pVFO->OUTPUT_POWER      << 2)
      | (pVFO->CHANNEL_BANDWIDTH << 1)
      | (pVFO->FrequencyReverse  << 0);
    State._8[5] = ((pVFO->DTMF_PTT_ID_TX_MODE & 7u) << 1)
#ifdef ENABLE_DTMF_CALLING
      | ((pVFO->DTMF_DECODING_ENABLE & 1u) << 0)
#endif
      ;
    State._8[6] =  pVFO->STEP_SETTING;
    State._8[7] =  pVFO->SCRAMBLING_TYPE;
    EEPROM_WriteBuffer(OffsetVFO + 8, State._8);

    SETTINGS_UpdateChannel(Channel, pVFO, true);

    if (IS_MR_CHANNEL(Channel)) {
#ifndef ENABLE_KEEP_MEM_NAME
      // clear/reset the channel name
      SETTINGS_SaveChannelName(Channel, "");
#else
      if (Mode >= 3) {
	SETTINGS_SaveChannelName(Channel, pVFO->Name);
      }
#endif
    }
  }

}

void SETTINGS_SaveBatteryCalibration(const uint16_t * batteryCalibration)
{
  uint16_t buf[4];
  EEPROM_WriteBuffer(0x1F40, batteryCalibration);
  EEPROM_ReadBuffer( 0x1F48, buf, sizeof(buf));
  buf[0] = batteryCalibration[4];
  buf[1] = batteryCalibration[5];
  EEPROM_WriteBuffer(0x1F48, buf);
}

void SETTINGS_SaveChannelName(uint8_t channel, const char * name)
{
  uint16_t offset = channel * 16;
  uint8_t buf[16] = {0};
  memcpy(buf, name, MIN(strlen(name), 10u));
  EEPROM_WriteBuffer(0x0F50 + offset, buf);
  EEPROM_WriteBuffer(0x0F58 + offset, buf + 8);
}

void SETTINGS_UpdateChannel(uint8_t channel, const VFO_Info_t *pVFO, bool keep)
{
#ifdef ENABLE_NOAA
  if (!IS_NOAA_CHANNEL(channel))
#endif
    {
      uint8_t  state[8];
      ChannelAttributes_t  att = {
	.band = 0xf,
	.compander = 0,
	.scanlist1 = 0,
	.scanlist2 = 0,
      };        // default attributes

      uint16_t offset = 0x0D60 + (channel & ~7u);
      EEPROM_ReadBuffer(offset, state, sizeof(state));

      if (keep) {
	att.band = pVFO->Band;
	att.scanlist1 = pVFO->SCANLIST1_PARTICIPATION;
	att.scanlist2 = pVFO->SCANLIST2_PARTICIPATION;
	att.compander = pVFO->Compander;
	if (state[channel & 7u] == att.__val)
	  return; // no change in the attributes
      }

      state[channel & 7u] = att.__val;
      EEPROM_WriteBuffer(offset, state);

      gMR_ChannelAttributes[channel] = att;

      if (IS_MR_CHANNEL(channel)) {	// it's a memory channel
	if (!keep) {
	  // clear/reset the channel name
	  SETTINGS_SaveChannelName(channel, "");
	}
      }
    }
}

void SETTINGS_WriteBuildOptions(void)
{
  uint8_t buf[8] = {0};
  buf[0] = 0
#ifdef ENABLE_FMRADIO
    | (1 << 0)
#endif
#ifdef ENABLE_NOAA
    | (1 << 1)
#endif
#ifdef ENABLE_VOICE
    | (1 << 2)
#endif
#ifdef ENABLE_VOX
    | (1 << 3)
#endif
#ifdef ENABLE_ALARM
    | (1 << 4)
#endif
#ifdef ENABLE_TX1750
    | (1 << 5)
#endif
#ifdef ENABLE_PWRON_PASSWORD
    | (1 << 6)
#endif
#ifdef ENABLE_DTMF_CALLING
    | (1 << 7)
#endif
    ;

  buf[1] = 0
#ifdef ENABLE_FLASHLIGHT
    | (1 << 0)
#endif
#ifdef ENABLE_WIDE_RX
    | (1 << 1)
#endif
#ifdef ENABLE_BYP_RAW_DEMODULATORS
    | (1 << 2)
#endif
#ifdef ENABLE_BLMIN_TMP_OFF
    | (1 << 3)
#endif
#ifdef ENABLE_SPECTRUM
    | (1 << 4)
#endif
    ;
  EEPROM_WriteBuffer(0x1FF0, buf);
}
